Just got a new 27" iMac and it came with the wireless keyboard and magic mouse. I'd used the Magic Mouse a little bit at the Apple Store and it felt good, after using it for some hours yesterday, it feels completely natural and nice. The scrolling is great..and if you intend to use it as a single or 2 button mouse..it works fine..it's the middle button functionality that's a little touchy for me right now..

Haven't been a PC gamer for a long time, so I can't tell you how well this compares to other mice out there..XBOX FTW..

I have the same and additional problems with MM. I understand that there are new versions of the software that fix these problems. I have downloaded the "latest" upgrade I could find (Version: 1.0. Post Date: October 27, 2009. Download IDL951.File Size: 36.22MB), but when I open it it tells me that there is a newer upgrade and it refuses to instal. Can someone tell me how to find the latest version of this software? I have installed the latest upgrades from Mac's Software Update but it wasn't among them. I stopped using MM shortly I got my new Mac because it kept freezing, and am now using Logitech, but I hate to waste my money, so I'd like to give it another try.
Thanks for help.

Since you didn't bother to mention what Mac and what OS version you're running, it's very hard to say what the problem is. Snow Leopard has the drivers for MM built right in, so there's no need for a driver.